[Qemu-devel] [PATCH v3 08/29] dump: change cpu_get_note_size to return ssize_t

[Paolo Bonzini <pbonzini@redhat.com>]

So that it can use the same prototype in both cases.  Check for failure.

Cc: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 cpu-all.h               |    4 ++--
 dump.c                  |    9 +++++++--
 target-i386/arch_dump.c |    2 +-
 3 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/cpu-all.h b/cpu-all.h
index e8749de..624030d 100644
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -552,7 +552,7 @@ int cpu_write_elf64_qemunote(write_core_dump_function f, CPUArchState *env,
 int cpu_write_elf32_qemunote(write_core_dump_function f, CPUArchState *env,
                              void *opaque);
 int cpu_get_dump_info(ArchDumpInfo *info);
-size_t cpu_get_note_size(int class, int machine, int nr_cpus);
+ssize_t cpu_get_note_size(int class, int machine, int nr_cpus);
 #else
 static inline int cpu_write_elf64_note(write_core_dump_function f,
                                        CPUArchState *env, int cpuid,
@@ -587,7 +587,7 @@ static inline int cpu_get_dump_info(ArchDumpInfo *info)
     return -1;
 }
 
-static inline int cpu_get_note_size(int class, int machine, int nr_cpus)
+static inline ssize_t cpu_get_note_size(int class, int machine, int nr_cpus)
 {
     return -1;
 }
diff --git a/dump.c b/dump.c
index 0ca14f8..b24d4be 100644
--- a/dump.c
+++ b/dump.c
@@ -750,6 +750,13 @@ static int dump_init(DumpState *s, int fd, bool paging, bool has_filter,
         goto cleanup;
     }
 
+    s->note_size = cpu_get_note_size(s->dump_info.d_class,
+                                     s->dump_info.d_machine, nr_cpus);
+    if (ret < 0) {
+        error_set(errp, QERR_UNSUPPORTED);
+        goto cleanup;
+    }
+
     /* get memory mapping */
     memory_mapping_list_init(&s->list);
     if (paging) {
@@ -784,8 +791,6 @@ static int dump_init(DumpState *s, int fd, bool paging, bool has_filter,
         }
     }
 
-    s->note_size = cpu_get_note_size(s->dump_info.d_class,
-                                     s->dump_info.d_machine, nr_cpus);
     if (s->dump_info.d_class == ELFCLASS64) {
         if (s->have_section) {
             s->memory_offset = sizeof(Elf64_Ehdr) +
diff --git a/target-i386/arch_dump.c b/target-i386/arch_dump.c
index 135d855..7c2b514 100644
--- a/target-i386/arch_dump.c
+++ b/target-i386/arch_dump.c
@@ -415,7 +415,7 @@ int cpu_get_dump_info(ArchDumpInfo *info)
     return 0;
 }
 
-size_t cpu_get_note_size(int class, int machine, int nr_cpus)
+ssize_t cpu_get_note_size(int class, int machine, int nr_cpus)
 {
     int name_size = 5; /* "CORE" or "QEMU" */
     size_t elf_note_size = 0;
-- 
1.7.10.1